Valve



nnvrann i. rriansoiv, or retenant-iro.

VALVE.

Application filed. November l2, 1921. Serial No. 514,445.

To all whom t mdfz/ concern.' Y Be it known that l, EDWARD I. PniinsoN,a citizen of the United States, anda resident of Toledo, Lucas County,Ohio, have made an lnvention Appertaining Vto Valves; and l do herebydeclare the following to be a ull,.clear,`and enact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same, reference being had Vto theaccompanying drawings, and to the characters of reference markedthereon, which form part or" this specification.

This invention relates particularly to check valves, but may be used inconnection with other valves where a close tluid tight joint is desired.

Considerable dirfliculty has been experienced in practice in providing acheck valve in gasoline'iiuid lines which, when closed, will ele-ctuallyseal the line against leakage of the fluid around the valve. The primaryobjectoi'l this invention is to provide a simple and inenpensive valveoi this character which will etlectually seal a fluid line against anyback leakage around the valve when closed. y rEhe invention is fullydescribed in the following specification, and while, in its broaderaspect, it is capable of embodiment in numerous forms, a preferredembodiment thereof is illustrated in the accompanying drawings, inwhich,-

Fig. l is a central vertical longitudinal section of a portion of atluid linefwith a valve embodying the invention disposed therein insimilar section and in open position, with a part in full, and Fig. 2 isa view similar to Fig. l with the valve in closed position.

Referring to the drawings, l designates a valve casing having an opening2 in its botl tom with which a fluid line pipe 3 may he connected andhaving an opening in its top portion with which a fluid line pipe t maybecconnected. The bottom of the valve casing 1 is provided around thewall 'forming the opening 2 with a trough 5, in the present instance oi'annular form, and this trough is preferably provided in its bottomentirely around the opening 2 with a V-shaped valve seat 6. The trough 5and valve seat 6 are intended to receive and hold a fluid line sealingagent 7 which is considerably heavier than the fluidv passingthrough theline, and it is found in practicev that mercury is admirably adapted forthis purpose.

A check valve 8 of inverted cup form is mounted in the casing l for treereciprocatory movements therein and is adapted to seat at its lower edgein the V-shaped recess 6 of the casing, the edge of the valve being ofcomplemental vform for such purpose. The lower or apex edge of the valveis provided with a downwardly facing' groove or recess 9 extendingentirely around the valve edge and adapted when the valve is seated, tocooperate with the bottom or apex portion of the groove G to form aclosed chamber in which a quantity of inercury or other sealing iluid Zis trapped, as shown at l() in Fig. 2. lt is evident that as the edge ofthe valve lowers to seating position through the mercury the valvegroove 9 will fill with mercury and this, together with the mercurywhich is not displaced from the bottom 01"' the recess 6 by the seatingmovement, will cooperatewith the conical coacting surfaces ot the valveand casing to efectually prevent leakage of any fluid around the valvewhen seat-ed. lhe valve 8 in the present instance has a stem ll risingtherefrom and projecting up through a guide l2 in the upper part oli'the casing.

lt is evident that while l have illustrated a particular form of valveand casing, the invention is not restricted to such torni or to use inconnection with a check type of valve, but is capable of numerousmodilications and changes without departing from the spirit 0I" theclaims.

Having thus described my invention, what l claim as new, and desire tosecure by Letters Patent, is,-

l. In a fluid line, a valve casing having inlet and outlet openings andhaving a recessed valve seat in its bottom between the two openings, asealing iiuid in the recess which fluid is heavier than the fluidpassing through the line, and a valve disposed in the casing for seatinginthe recess of the valve seat Vand cooperating with the valve seat whenseated therein to form a space which is lled with the sealing fluid.

2. ln a fluid line, a valve casing having inlet and outlet openings, avalve seating recess in its bottom, mercury in said recess,

and a valve movable in the easing to open and close the fluid line andhaving a portion complemental to the recess for seating therein andprovided with a groove which cooperates with the recess to trap aportion of the mercury Within the recess when' the valve is seated.

. 3. In a fluid line, a valve casing having inlet and outlet openings, avalve seating recess of substantially V-forinV in the casing bottom,mercury in said recess, a valve mov-y able in the'casing to openandclose the fluid line and having a V-shaped portion com- Vplemental tothe reeess'for seating therein,

the apex portion of the seating portion of f the valve being providedwith a downwardly opening groove-to receive and'trap a portion of themercury Within the base oi the recess when the valve is seated.

4. In a fluid line, a valve casing having inlet and outlet openings withone of such openings in its bottom, the casing having a valve seatingrecess in its bottom around the bottom openingmercury disposed in saidto form achamber Which entirely surrounds the bottom opening and in'which a. portion ofthe mercury is trapped Wlienjthewalve seats in therecess. y

In testimony whereof I liaverhereunto name to this specification.

subscribedmy EDWARD I. PICARSON.

